Former Owner
- Nicolas Rauch1
- Norman H. Strouse1
- Notre-Dame de Macourt monastery1
- Otto Orren Fisher1
- Petrus Giraud1
- Petrus Hofstede1
- Philadelphia Rare Books & Manuscripts Company1
- Philip C. Duschnes1
- Philip C. Duschnes Rare Books & First Editions1
- Philip Kerr, 11th Marquess of Lothian1
- Philippe de Béthune1
- Phillip J. Pirages Fine Books & Manuscripts1
- Pius XI1
- R. Stora and Company1
- Ricardo, Conde de Benahavis Heredia1
- Robert Garrett1
- Robert de Hangest1
- Rushton Mather Dorman1
- S. Ereilter1
- Samuel Dennis1